مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 366
Purification
How to act when relieving oneself - Section 3
وَعَن زيد بن حَارِثَة عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَنَّ جِبْرِيلَ أَتَاهُ فِي أَوَّلِ مَا أُوحِيَ إِلَيْهِ فَعَلَّمَهُ الْوُضُوءَ وَالصَّلَاةَ فَلَمَّا فَرَغَ مِنَ الْوُضُوءِ أَخَذَ غُرْفَةً مِنَ الْمَاءِ فَنَضَحَ بِهَا فَرْجَهُ» . رَوَاهُ أَحْمد وَالدَّارَقُطْنِيّ
Zaid b. Haritha reported on the Prophet’s authority that when he first received inspiration Gabriel came to him and taught him the ablution and the prayer. When he finished the ablution he took a handful of water and sprinkled his private parts with it. Ahmad and Daraqutni transmitted it.
Mishkat al-Masabih, 366حسن (الألباني)